I don’t know about making human models, all I can offer is my lame person who has seen humans his entire life perspective. He looks flat but that’s because you took the screenshot in orthographic view. Also looks like his mouth and chin are way down there, like it was pulled down. And maybe the face feels squished from the sides to the center. Remember making humans in 3D is the holy grail, it’s no easy thing you are attempting, it’s going to take a lot of practice, so keep going.
